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Won't Fix
Votes
3
Found in
2018.4.32f1
2019.3.0a1
2020.3
2021.1
2021.2
Issue ID
1325578
Regression
Yes
Reference to custom Mesh is lost on a Prefab when upgrading to 2019.3.0a1 or later
How to reproduce:
1. Open the attached "1325578_Repro" project in Unity 2019.2.21f1 or earlier
2. Observer the Mesh Filter Inspector of the "Boomerang" Asset (in the Assets folder)
3. Close the Project and open it in Unity 2019.3.0a1 or later
4. Observer the Mesh Filter Inspector of the "Boomerang" Asset
Expected results: The mesh is not missing
Actual results: The mesh is missing
Reproducible with: 2019.3.0a1, 2019.4.24f1, 2020.3.4f1, 2021.1.3f1, 2021.2.0a13
Not reproducible with: 2018.4.33f1, 2019.2.21f1
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Resolution Note (2021.2.X):
Some meta files in the project contains empty lines which are tripping the UnityYaml parser. For performance UnityYaml parser supports only a subset of the yaml specification. Removing those empty lines will cause the issue to go away. Unity will not produce .meta with empty lines and therefore closing this as won't fix.